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[TekScopes] wrote:

P { margin-bottom: 0.21cm; }I recently was given a 7934 minusplugins as 'spares or repair' and was surprised to find that innon-storage mode everything that I have tried so far works perfectlyand the

Hi Michael, Thanks for the recommendation on Bourns. I ordered enough to replace all of them in the scope since I have found three bad. I suspect the 50 ohm ones in the .2 mv circuit were killed by

n4bos@... [TekScopes] wrote: The oil is to keep moisture out. My preference is genuine Bourns parts.

UPDATE: Well, the scope is MOSTLY fixed.... Turned out the reason I didn't have sweep was R740, (A Sweep Gain) pot was OPEN. I replaced it with another 1K pot and the sweep was back. Then I set

Meh, in any case, if you get the dreaded trace deflected off the CRT and you can't get it back with the controls, the input dual FET might be bad. If it is, apparently 2x 2N3819 TO-92s glued together

Thanks for the information everyone. I'm fairly new to this group and it is amazing the level of knowledge here, I have a lot to learn. I picked up a couple Tektronix P6047 probes to match the 454

I was recently helping a friend troubleshoot a Tek PS280 that he had bought on e-bay. In the process I found a fault which is design related and may be more common. The symptoms were that the

I have replied to similar messages in the past. Peter’s reply is right on. To get the best performance, higher bandwidth scopes with 1 Mohm inputs need the probe to be designed to counteract the

Hi Tom, At this point, I have trigger but the actual sweep seems to be a bit flaky. I had a nice trace for a while but now I have just the trigger as seen by just flashing dots on the screen. Now I

Hi Steve, Congratulations on a successful step in your 2215A repair! I do not have enough knowledge to properly comment on the transistor question, but my guess is that the choice of transistor is

Bump... Did you repair the 1A4? I have to repair mine now... I need some success stories.

Thanks Tom.... I guess I needed a nudge to go back through that section. I had before, checking voltages and resistances and everything LOOKED close..... Well, thanks to your suggestion, I went

I just happened to see your post and then eBay item number 121520632728 right after. It is a 576 that is being parted out. Maybe the transformer is still available. DaveD

Hello Dave, I'm the guy from germany with the HV transformer at fault in an otherwise quite well working 576. If you happen to have one of those rewound transformers left, I'll be interested of

Hi to All, Just received a DL-11 Delay-Line. On this moment I'am looking for its Operation/Service Manual to make it complete. I can only locate the 070-7051-00 DataSheet of it. Anybody who has

All of the trigger inputs (internal, line, and external) should activate the trigger light when a trigger is present. If P-P Auto triggering is active, it should be difficult *not* to have a

I have a scan of a Huntron 1005B-1 manual (37 pages) if anyone needs it.Has parts list & schematic. ?HankC, Boston WA1HOS [Non-text portions of this message have been removed]

Have you tried using a external trigger input? Mike

Hi Steve, How about starting your search where the A sweep waveform originates on page 3-10 in the "Theory of Operation" section. It clearly describes how the waveform is generated. tom jobe...